To install Google Earth from the UbuntuUpdates.org 3rd Party PPA Repository:
UbuntuUpdates - PPA: Google Earth
Using this method downloads and installs Google Earth directly from dl.google.com … and as it is a PPA repository, your Ubuntu Updater will make sure you always have the latest version
First make sure all package managers, and he updater are closed.
Then open a terminal and run these 4 commands:
wget -q -O - "https://dl-ssl.google.com/linux/linux_signing_key.pub" | sudo apt-key add -
sudo sh -c 'echo "deb http://dl.google.com/linux/earth/deb/ stable main" >> /etc/apt/sources.list.d/google.list'
then
sudo apt-get update
then
sudo apt-get install google-earth-stable
Google Earth should now be installed … Have fun.